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How high will a hot air balloon rise if the temperature inside is maintained at 340 K? Assume that the ambient temperature is 300 K.Assume that the pressure inside and outside are the same, but the density inside is reduced by heating. It is convenient to reference the calculation to the temperature of the atmosphereT0 = 300 K. This temperature corresponds to the density at sea level. To what height does the air balloon rise?Please give your answer in meters.
A circuit contains six 205 ohm lamps with 60 W bulbs and a 9 ohm heater connected in parallel. voltage across the circuit is 120 V.what is the current in the circuit when four lamps are turned on.
How many electrons must be removed from each of two 4.4-kg copper spheres to make the electric force of repulsion between them equal in magnitude to the gravitational attraction between them?
An object with a mass of 5.5 kg is allowed to slide from rest down an inclined plane. What is the speed of the object at the bottom of the plane
A submarine dives 90.0 m at an angle of 8.0° below the horizontal. What are the horizontal and vertical components of submarine's displacement? (Imagine that upward and the direction of the submarine's horizontal motion is positive.)
The length of a hollow pipe is 658 cm. The air column in the pipe is vibrating and has four nodes. Find the frequency of the sound wave in the pipe
At what height above the surface of the earth does the balloon have a velocity of 8.10 m/s.
X- rays are created in a standard x-ray tube by accelerating electron across a potential difference of V and having the electrons collide with a metal target to eject x-ray. when the wavelength of the x-ray is measured using Bragg diffraction from..
A 8.84-g bullet is moving horizontally with a velocity of +346 m/s, where the sign + indicates that it is moving to the right, What is the velocity of the second block after the bullet imbeds itself
Two automobiles are equipped with the same single-frequency horn. When one is at rest and the other is moving toward the first at 20 m/s, What does the frequency the horns emit
A 95.0A current circulates around a 2.30-mm-diameter superconducting ring. What is the ring's magnetic dipole moment
Two blocks connected by a string are on a horizontal frictionless surface, How much time is required for the hanging weight to fall 10.0 cm if it starts from rest
Suppose a 64.0 kg boy and a 48 kg girl use a massless rope in a tug-of-war on an icy, resistance-free surface. If the acceleration of the girl toward the boy is 3.00 m/s2, find out the magnitude of the acceleration of the boy toward the girl.
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